Double barrel filter made of SUS304 high quality stainless steel, is composed of two cylinders, inner and outer surface polished 0.4um, the top is equipped with pressure gauge, exhaust valve, suitable for removing fresh milk, sugar solution, beverage, oral solution Such as the liquid in a variety of invisible solid impurities purification. Two filters are used interchangeably to replace the filter in a non-stop condition for long-term continuous production.